HESI A2-BIOLOGY: CELLULAR RESPIRATION EXAM

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HESI A2-BIOLOGY: CELLULAR RESPIRATION EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -38 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Which of the following correctly lists the reactants and products of the Krebs cycle?

• Reactants: Acetyl CoA, NADH, FADH2;Products: Carbon dioxide, NAD+, FAD
• Reactants: Acetyl CoA, NAD+, FAD; Products: Carbon dioxide, NADH, FADH2
• Reactants: Acetyl CoA, NAD+; Products: Carbon dioxide, NADH, FAD, FADH2
• Reactants: Carbon dioxide, NADH, FADH2; Products: Acetyl CoA, NAD+, FAD

Answer:

Reactants: Acetyl CoA, NAD+, FAD; Products: Carbon dioxide, NADH, FADH2 Question 2: Adenosine triphosphate is an adenosine molecule bonded to three phosphate groups. To access the energy in ATP, one of the three phosphate bonds are broken, leaving two remaining phosphate groups attached to the adenosine molecule. This result is adenosine diphosphate (ADP).

Answer:

• Glycolysis: The first step is the conversion of glucose to pyruvate. This step takes place in the cytosol

(the jelly-like substance in the cytoplasm of the cell) and produces two molecules of ATP, two molecules of pyruvate, and two molecules of NADH.

• The Krebs Cycle: The Krebs cycle is also known as the citric acid cycle. In this step, the pyruvate

created during glycolysis is transported to the mitochondrion where it is used in a series of reactions.Two ATP molecules, six carbon dioxide molecules, and six NADH molecules are produced.

• Electron transport chain: The third step oxidizes NADH molecules to produce oxygen and water. The

electron transport chain produces the most energy: 28 to 32 molecules of ATP.

Question 3: What does the Kerbs cycle produce?

Answer:

Co2, NADH, FADH2, AND ATP

Question 4: Where does aerobic respiration occur?

Answer:

cytoplasm and mitochondria

Question 5: What are the stages of fermentation?

Answer:

NAD+ regeneration and glycolysis only Question 6: Which of the following is not a product in the net reaction for glycolysis?

• Pyruvate

- NADH

• Water
• ADP

Answer:

ADP ADP is consumed in a greater quantity than it is produced, eliminating it from the net.Question 7: What are the initial reactants that start the electron transport chain?

• 2 hydrogen ions only
• 2 hydrogen ions, 2 electrons, and an oxygen molecule
• 2 electrons only
• An oxygen molecule only

Answer:

• hydrogen ions, 2 electrons, and an oxygen molecule

Question 8: Where is the electron transport chain located?

Answer:

mitochondria

Question 9: What is NADH

Answer:

electron carrier

Question 10: What is the product of anaerobic ?

Answer:

lactic acid and 2 ATP

Question 11: Not all living organisms undergo what cycle?

Answer:

Krebs cycle Question 12: What number of ATPs are generated during the process of aerobic respiration?

Answer:

36 Question 13: The Krebs cycle occurs in cellular respiration only, and it is not a part of ________

Answer:

photosynthesis.Question 14: What is the molecule that is used as the energy currency of the cell ?

Answer:

ATP

Question 15: Is glycolysis aerobic or anaerobic?

Answer:

anaerobic Question 16: In which of the following stages of cellular respiration are electrons passed from one member of the transport chain to another in a series of redox reactions to make ATP?

Answer:

electron transport chain

Question 17: In what part of the cell does the Kerbs cycle take place?

Answer:

mitochondria

Question 18: Where does anaerobic respiration occur?

Answer:

cytoplasm Question 19: Glycolysis is the first stage in the process of cellular respiration. What is the main transformation that occurs during glycolysis?

• Glycolysis produces pyruvate and ATP through oxidizing glucose and NADH
• Glycolysis produces ATP, pyruvate, and NADH by oxidizing glucose
• Glycolysis produces ATP through the process of oxidative phosphorylation
• Glycolysis produces CO2, NAD, and pyruvate by oxidizing glucose

Answer:

Glycolysis produces ATP, pyruvate, and NADH by oxidizing glucose

Question 20: What are the reactants and products of cellular respiration?

Answer:

Reactants: Oxygen and glucose

Products: Carbon dioxide, water, ATP

Question 21: In what part of the cell does glycolysis take place?

Answer:

Cytoplasm (cytosol)

Question 22: What is cellular respiration?

Answer:

a metabolic pathway that breaks down glucose and produces ATP Question 23: Fermentation does not use oxygen; thus, it is "anaerobic." It releases _____ as a by-product.

Answer:

lactic acid